Once you have an account in WonderKing. You can kill pumas to level(wk zed) 5 fast. It is very easy to do some beginning quests. You will have some pots to use if you are not funded. From level 5, you need to kill Blue Housel which is better for your level up. For 8/10 For Blue Housel Place; gives a lot of exp at low level especially when it is 2x or 3x. You can get to level 10 in less than 10min. Bring pots just in case.
Then you can fight in the honey place, [Bearded Bees] at level 11-20. Wind Cliff is a bit rough to train at unless you do Bibi's quest and get the weapon she supplies. And 6/10 For Bee's Place; the exp is kind of slow, but it is still the best place to hunt at from level 11-15. Or you can choose to kill in Elgaill Cliff or Wind Cliff where the [Blue/Red housels], [Scorpions], and [Ponies] spawn which is 7.5/10 best with party but, also good while soloing.
By the way that around level(WonderKing powerleveling) 15, you should have Bibi's weapon [Level 14 Chain quest from Bibi] and a lot of pots to get to 20 in no time. Hunt where [Lind Hawk] spawns. Kill the [Blue Birds] there. They give good exp. There have 9/10 For Lind Hawk area. Please be sure to bring a lot of pots. Level 16~26 if you hunt here. Just have fun in WonderKing.